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Pisuin Genetics
Volume 25
1993
Research Reports
71
Chromosomal rearrangement in line WL1393
I write to inform you that the map segment containing genes His(2-6), A, Lf,
and His7, reported in (1), has not been affected by the chromosome rearrangement found
in line WL1393. This line was a progenitor of the individual plant His(2-6)1323, A, Lf,
His73 (selected from the F2 of the cross WL1393 x WL1688) which was used as the
female parent, together with WL102 as the male parent, in Cross 1 of Kosterin (1). This
plant did inherit the rearranged karyotype from WL1393, since we observed semisterility
in eight of twelve resulting F 1 plants. Crosses back to WL102 gave progenies
segregating for semisterility in accordance with a 1:1 ratio. This semisterility exhibited
no linkage to any of the genes His(2-6), a, lf, and His7. Hence, the corresponding
region of the genome was not involved in the rearrangement. However, the semisterility
turned out to be closely linked to gene tl. The combined progeny of these eight plants
segregated as follows: semisterile: 106 Tl/tl w , 14 tl w /tl w ; fertile: 9 Tl/tl w , 82
tl w /tl w ; providing a recombination value of 10.9 ± 2.2 cM. The parental lines of
Cross 2 reported in (1), which yielded the same gene order, proved to have normal
karyotypes.
1. Kosterin, O.E. 1992. Pisum Genet. 24:56-59.
O.E.Kosterin, Novosibirsk
Pisum Genetics content and direction
At the recent meeting of the National Pea Improvement Association some of our
members expressed the view that the Newsletter had been narrowed too much in scope
and that information on pathology, physiology, etc. was no longer to be found in the
letter. They didn't know if this was intentional or the result of the change of the title to
Pisum Genetics which might discourage contributors other than geneticists. Perhaps you
could let us know how you see the long term development of the publication.
David E. Polson, NPIA Secretary/Treasurer, Lewisville
[Good question. Pisum Genetics is published by the Pisum Genetics
Association. I interpret that to mean that in general articles should be about peas, primitive
or modern, and have an element of, or basis in, genetics. While core articles will
involve basic genetics, mapping, cytogenetics and molecular genetics, a vast range of
other studies wholly satisfy the above criteria, e.g. in pathology, physiology,
developmental biology, morphogenesis, anatomy, cell biology, biochemistry, nutrition,
food technology, and so on. Moreover, the ultimate test which I apply is to ask the
question - would this item be of interest to PGA members? Some articles with no
genetic component may still meet that criterion. As for direction, I would welcome
suggestions and comments from readers. A journal must be prepared to grow and
adapt as needs require. One thing is certain, it is my desire to produce a useful and
internationally respected journal.
On behalf of members, I thank the NPIA for a USD 600 donation which came with
David Polson's letter. This money enables Pisum Genetics to go to places it would
otherwise not reach and helps us meet our stated aim to foster communication among all
pea workers around the world. Ed.]